Panel sensing device and positioning location searching...

Details Panel sensing device and positioning location searching... Panel sensing device and positioning location searching...

2006-05-02

2006-05-02

Tran, Henry N. (Department: 2674)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C178S018010, C178S018030, C178S018070, C178S019010

Reexamination Certificate

active

07038666

ABSTRACT:
A panel sensing device and a positioning location searching method of the same are disclosed. A control unit serves to provide at least one reference voltage and at least one reference voltage with opposite phase. Thereby, a plurality of position blocks are defined by the electric field distributions produced by the reference voltages. A sensing pen is used to touch the sensing plate for sensing the object voltage of a touch position. The control unit searches the touch position according to the phase and level of the object voltage and the reference voltages.

REFERENCES:
patent: 5563381 (1996-10-01), Crooks et al.
patent: 5646377 (1997-07-01), Oda
patent: 5909382 (1999-06-01), Neoh
patent: 6400359 (2002-06-01), Katabami

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